StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POCalculate a Running Total in SQL Server
primarykey
Id
860966
data
AcceptedAnswerId
861073
AnswerCount
14
ClosedDate
CommentCount
4
CommunityOwnedDate
CreationDate
2009-05-13T23:42:26.890
FavoriteCount
57
LastActivityDate
2018-02-25T12:54:47.777
LastEditDate
2015-08-11T20:44:24.113
LastEditorUserId
13302
OwnerUserId
22194
ParentId
0
PostTypeId
1
Score
142
ViewCount
193306
LastEditorDisplayName
text
Body
Imagine the following table (called <code>TestTable</code>): <pre><code>id somedate somevalue -- -------- --------- 45 01/Jan/09 3 23 08/Jan/09 5 12 02/Feb/09 0 77 14/Feb/09 7 39 20/Feb/09 34 33 02/Mar/09 6 </code></pre> I would like a query that returns a running total in date order, like: <pre><code>id somedate somevalue runningtotal -- -------- --------- ------------ 45 01/Jan/09 3 3 23 08/Jan/09 5 8 12 02/Feb/09 0 8 77 14/Feb/09 7 15 39 20/Feb/09 34 49 33 02/Mar/09 6 55 </code></pre> I know there are <a href="http://geekswithblogs.net/Rhames/archive/2008/10/28/calculating-running-totals-in-sql-server-2005---the-optimal.aspx" rel="noreferrer">various ways of doing this</a> in SQL Server 2000 / 2005 / 2008. I am particularly interested in this sort of method that uses the aggregating-set-statement trick: <pre><code>INSERT INTO @AnotherTbl(id, somedate, somevalue, runningtotal) SELECT id, somedate, somevalue, null FROM TestTable ORDER BY somedate DECLARE @RunningTotal int SET @RunningTotal = 0 UPDATE @AnotherTbl SET @RunningTotal = runningtotal = @RunningTotal + somevalue FROM @AnotherTbl </code></pre> ... this is very efficient but I have heard there are issues around this because you can't necessarily guarantee that the <code>UPDATE</code> statement will process the rows in the correct order. Maybe we can get some definitive answers about that issue. But maybe there are other ways that people can suggest? edit: Now with a <a href="http://sqlfiddle.com/#!3/c8880/4" rel="noreferrer">SqlFiddle</a> with the setup and the 'update trick' example above
Tags
<sql><sql-server><tsql><running-total>
Title
Calculate a Running Total in SQL Server
singulars
PostAcceptedAnswerId
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USmarc_s
UserOwnerUserId
1. UScodeulike
plurals
PostLinksPostIdRelatedPostId
1. PL
 singulars
 LinkTypeLinkTypeId
 LTLinked
2. PL
 singulars
 LinkTypeLinkTypeId
 LTLinked
PostLinksRelatedPostIdPostId
1. PL
 singulars
 LinkTypeLinkTypeId
 LTLinked
2. PL
 singulars
 LinkTypeLinkTypeId
 LTLinked
3. PL
 singulars
 LinkTypeLinkTypeId
 LTLinked
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
2. PO
 singulars
 PostTypePostTypeId
 PTAnswer
3. PO
 singulars
 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 POCalculate a Running Total in SQL Server
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
2. VO
 singulars
 PostPostId
 POCalculate a Running Total in SQL Server
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
3. VO
 singulars
 PostPostId
 POCalculate a Running Total in SQL Server
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.